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| author |   Fiona Ebner <f.ebner@proxmox.com> | 2023-10-19 15:19:36 +0200 |
|---|---|---|
| committer |   Kevin Wolf <kwolf@redhat.com> | 2023-10-31 13:51:36 +0100 |
| commit | 302823854b078f0525cf1babcc4fc9ff7b7d5f71 (patch) | |
| tree | 12ffe2f508a27a27404bd8ae1aa1d0c9c23d215a /hw/core/machine-hmp-cmds.c | |
| parent | block: avoid potential deadlock during bdrv_graph_wrlock() in bdrv_close() (diff) | |
| download | qemu-302823854b078f0525cf1babcc4fc9ff7b7d5f71.tar.xz qemu-302823854b078f0525cf1babcc4fc9ff7b7d5f71.zip | |
blockdev: mirror: avoid potential deadlock when using iothread
The bdrv_getlength() function is a generated co-wrapper and uses
AIO_WAIT_WHILE() to wait for the spawned coroutine. AIO_WAIT_WHILE()
expects the lock to be acquired exactly once.
Fix a case where it may be acquired twice. This can happen when the
source node is explicitly specified as the @replaces parameter or if the
source node is a filter node.
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Message-ID: <20231019131936.414246-4-f.ebner@proxmox.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'hw/core/machine-hmp-cmds.c')
0 files changed, 0 insertions, 0 deletions